undefined function or variable 'th14'

hi, i am new in matlab i have a problem with finding 'th14' can u help me please? it say * 'Undefined function or variable 'th14''. *

• for i=1:1:360

 th12=i/deg;  
 tth12(i)=th12; % tth12(i) indicates the i‟th element of the array. 

 th14=-1*(atan((0.08*cos(th12)-0.18-0.05*cos(th14))/(0.08*sin(th12)-0.05*sin(th14))));
 tth14(i)=th14;*

Answer 1

[Sean de Wolski]

th14=-1*(atan((0.08*cos(th12)-0.18-0.05*cos(th14))/(0.08*sin(th12)-0.05*sin(th14))));

This is the line where th14 is defined, but the right hand side is attempting to use th14 which does not exist since it has not been defined yet.

[baris]

but this is the only function to find th14 so is there any way to define as symbol or sth to solve the equation?

[Sean de Wolski]

syms th14

would define it as a symbol.